Flatås IL was one of 494 clubs from Norway that had teams playing during Norway Cup 2018. They participated with one team in Boys 13 - born 2005 - 9 aside.

In addition to Flatås IL, 152 other teams from 6 different countries played in Boys 13 - born 2005 - 9 aside. They were divided into 38 different groups, whereof Flatås IL could be found in Group 32 together with Nordre Land IL 1, Hausvik FK and Korsvoll IL 2.

Flatås IL continued to Playoff A after reaching 2:nd place in Group 32. In the playoff they made it to 1/64 Final, but lost it against Magnet Youth Sports Org with 2-3. In the Final, Lørenskog won over Eik IF Tønsberg 1 and became the winner of Playoff A in Boys 13 - born 2005 - 9 aside.

Flatås comes from Trondheim which lies approximately 400 km from Oslo, where Norway Cup takes place. The area around Trondheim does also provide 25 additional clubs participating during Norway Cup 2018 (Among others: Gimse IL, Charlottenlund SK, Stjørna IL, Hegra IL, Orkla FK, Skjelstadmark IL, Strindheim Toppfotball, Melhus IL, Kattem IL Fotballklubb and Tiller IL).